Brake disc



FIG. 1 is a front view of a brake disc showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is another front view thereof showing the underlying vanes in broken lines.

The broken line portions are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a brake disc, as shown and described. 